<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <input type="text" placeholder="请输入0-100之间的整数" id="i1">
    <input type="button" value="猜一猜" onclick="f()">
    <div>结果:<span>0</span></div>
    <script>
        //得到0-100随机整数
        let x = parseInt(Math.random()*101);
        let count = 0;
        let i1 = document.querySelector("#i1");
        let s = document.querySelector("span");

        function f() {
            count++;
            if (isNaN(i1.value)) {
                s.innerText = "输入错误!";
                return;
            }
            if (i1.value > x) {
                s.innerText = "猜大了!";
            } else if (i1.value < x) {
                s.innerText = "猜小了!";
            } else {
                s.innerText = "恭喜你第"+count+"次猜对了!";
                //次数清零,并生成一个随机整数
                count = 0;
                x = parseInt(Math.random()*101);
            }
        }
    </script>

</body>
</html>